pH-metric determination of acid values in oilseeds without titration

被引：9

作者：

Kuselman, I ^{[1
]}

Tur'yan, YI ^{[1
]}

Burenko, T ^{[1
]}

Goldfeld, I ^{[1
]}

Anisimov, B ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Natl Phys Lab Israel, IL-91904 Jerusalem, Israel

来源：

TALANTA | 1999年 / 49卷 / 03期

关键词：

acid value; oilseeds; pH-metry; metrological parameters;

D O I：

10.1016/S0039-9140(99)00049-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new pH-metric method for determination of acid values in oilseeds without titration has been developed in the range 0.6-10 and more mg KOH/g. The method is based on a rapid (1-2 min) selective and complete extraction of free fatty acids from an oilseed test portion into a special reagent A, separation of the solution from the solid oilseed material by centrifugation or filtration, transfer of an aliquot of the solution into a pH-metric cell with reagent B for measurement of conditional pH(1)' of the formed mixture, addition of standard acid (HCl or H2SO4) and pH(2)(') measurement. The reagents are non-toxic, and the method is rapid. Its metrological parameters for Soybean, Canola and Sunflower oilseeds are satisfactory for practical purposes. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：629 / 637

页数：9

共 12 条

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